At the season of Myanmar's autonomy in 1948, the Tatmadaw was frail, little and divided. Splits showed up along the lines of ethnic foundation, political association, authoritative starting point and diverse administrations. Its solidarity and operational effectiveness was additionally debilitated by the obstruction of regular citizens and legislators in military undertakings, and the recognition hole between the staff officers and field authorities.

The most difficult issue was the pressure between ethnic Karen Officers, originating from the British Burma Army and Bamar officers, originating from the Patriotic Burmese Forces (PBF).

As per assention came to at Kandy Conference in September 1945, the Tatmadaw was revamped by joining the British Burma Army and the Patriotic Burmese Forces. The officer corps shared by ex-PBF officers and officers from British Burma Army and Army of Burma Reserve Organization (ARBO).

The British likewise chose to frame what were known as "Class Battalions" in view of ethnicity. There were a sum of 15 rifle brigades at the season of autonomy and four of them were comprised of previous individuals from PBF. Every single compelling position inside the War Office and summons were kept an eye on with non-previous PBF Officers.

All administrations including military designers, supply and transport, arms and medicinal administrations, Navy and Air Force were altogether instructed by previous Officers from ABRO and British Burma Army.